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using Gestor.Common.Helpers;
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace Gestor.Common.Security
{
public class Token
{
private readonly byte[] _key = new byte[] { 45, 103, 73, 146, 210, 184, 220, 224, 94, 3, 114, 60, 211, 119, 21, 100, 18, 201, 230, 195, 119, 252, 73, 208, 209, 39, 222, 48, 47, 142, 94, 24 };
private readonly byte[] _initializationVector = new byte[] { 95, 17, 151, 243, 209, 243, 119, 80, 63, 252, 13, 180, 162, 13, 23, 218 };
private readonly static byte[] Salt;
static Token()
{
Token.Salt = new byte[] { 38, 220, 255, 0, 173, 237, 122, 238, 197, 254, 7, 175, 77, 8, 34, 60 };
}
public Token()
{
}
public string AggerDecrypt(string cipher)
{
string str = string.Concat("aGG3r", Convert.ToString(1012), "#w3BDz$");
byte[] numArray = Convert.FromBase64String(cipher);
Rijndael bytes = Rijndael.Create();
Rfc2898DeriveBytes rfc2898DeriveByte = new Rfc2898DeriveBytes(str, Token.Salt);
bytes.Key = rfc2898DeriveByte.GetBytes(32);
bytes.IV = rfc2898DeriveByte.GetBytes(16);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, bytes.CreateDecryptor(), CryptoStreamMode.Write);
cryptoStream.Write(numArray, 0, (int)numArray.Length);
cryptoStream.Close();
byte[] array = memoryStream.ToArray();
return Encoding.UTF8.GetString(array);
}
public string AggerEncrypt(string plain)
{
string str = string.Concat("aGG3r", Convert.ToString(1012), "#w3BDz$");
byte[] bytes = Encoding.UTF8.GetBytes(plain);
Rijndael rijndael = Rijndael.Create();
Rfc2898DeriveBytes rfc2898DeriveByte = new Rfc2898DeriveBytes(str, Token.Salt);
rijndael.Key = rfc2898DeriveByte.GetBytes(32);
rijndael.IV = rfc2898DeriveByte.GetBytes(16);
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndael.CreateEncryptor(), CryptoStreamMode.Write);
cryptoStream.Write(bytes, 0, (int)bytes.Length);
cryptoStream.Close();
return Convert.ToBase64String(memoryStream.ToArray());
}
public string Decrypt(string plainText)
{
string end;
string str;
try
{
byte[] numArray = Convert.FromBase64String(plainText);
using (AesCryptoServiceProvider aesCryptoServiceProvider = new AesCryptoServiceProvider())
{
ICryptoTransform cryptoTransform = aesCryptoServiceProvider.CreateDecryptor(this._key, this._initializationVector);
using (MemoryStream memoryStream = new MemoryStream(numArray))
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoTransform, CryptoStreamMode.Read))
{
using (StreamReader streamReader = new StreamReader(cryptoStream))
{
end = streamReader.ReadToEnd();
}
}
}
}
str = end;
}
catch (Exception exception)
{
str = null;
}
return str;
}
public bool DefaultDecryption(string ecryptedText)
{
return this.DefaultVerification(this.Decrypt(ecryptedText).Split(new char[] { ':' }));
}
public string DefaultEncryption(long clientId, long providerId)
{
object obj = providerId;
DateTime universalTime = Functions.GetNetworkTime().ToUniversalTime();
string str = string.Format("{0}:{1}", obj, universalTime.Ticks);
return this.Encrypt(str);
}
public bool DefaultVerification(string[] textDecrypted)
{
if ((int)textDecrypted.Length < 2)
{
return false;
}
DateTime dateTime = new DateTime(long.Parse(textDecrypted[1]), DateTimeKind.Utc);
dateTime = dateTime.Date;
DateTime dateTime1 = dateTime.AddHours(5);
dateTime = Functions.GetNetworkTime().ToUniversalTime();
return dateTime1 >= dateTime.Date;
}
public string Encrypt(string plainText)
{
byte[] array;
using (AesCryptoServiceProvider aesCryptoServiceProvider = new AesCryptoServiceProvider())
{
ICryptoTransform cryptoTransform = aesCryptoServiceProvider.CreateEncryptor(this._key, this._initializationVector);
using (MemoryStream memoryStream = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoTransform, CryptoStreamMode.Write))
{
using (StreamWriter streamWriter = new StreamWriter(cryptoStream))
{
streamWriter.Write(plainText);
}
array = memoryStream.ToArray();
}
}
}
return Convert.ToBase64String(array);
}
public bool VerifyToken(string authHeader)
{
bool flag;
try
{
flag = (authHeader.Contains("Token") ? this.DefaultDecryption(authHeader.Replace("Token ", "")) : false);
}
catch (Exception exception)
{
flag = false;
}
return flag;
}
}
}
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